[linux-block.git] / drivers / mfd / wm831x-spi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * wm831x-spi.c  --  SPI access for Wolfson WM831x PMICs
 *
 * Copyright 2009,2010 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/pm.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/err.h>

#include <linux/mfd/wm831x/core.h>

static int wm831x_spi_probe(struct spi_device *spi)
{
	struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
	struct wm831x *wm831x;
	enum wm831x_parent type;
	int ret;

	type = (uintptr_t)spi_get_device_match_data(spi);
	if (!type) {
		dev_err(&spi->dev, "Failed to match device\n");
		return -ENODEV;
	}

	wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);
	if (wm831x == NULL)
		return -ENOMEM;

	spi->mode = SPI_MODE_0;

	spi_set_drvdata(spi, wm831x);
	wm831x->dev = &spi->dev;
	wm831x->type = type;

	wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
	if (IS_ERR(wm831x->regmap)) {
		ret = PTR_ERR(wm831x->regmap);
		dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	if (pdata)
		memcpy(&wm831x->pdata, pdata, sizeof(*pdata));

	return wm831x_device_init(wm831x, spi->irq);
}

static int wm831x_spi_suspend(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	return wm831x_device_suspend(wm831x);
}

static int wm831x_spi_poweroff(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	wm831x_device_shutdown(wm831x);

	return 0;
}

static const struct dev_pm_ops wm831x_spi_pm = {
	.freeze = wm831x_spi_suspend,
	.suspend = wm831x_spi_suspend,
	.poweroff = wm831x_spi_poweroff,
};

static const struct spi_device_id wm831x_spi_ids[] = {
	{ "wm8310", WM8310 },
	{ "wm8311", WM8311 },
	{ "wm8312", WM8312 },
	{ "wm8320", WM8320 },
	{ "wm8321", WM8321 },
	{ "wm8325", WM8325 },
	{ "wm8326", WM8326 },
	{ },
};

static struct spi_driver wm831x_spi_driver = {
	.driver = {
		.name	= "wm831x",
		.pm	= &wm831x_spi_pm,
		.of_match_table = of_match_ptr(wm831x_of_match),
		.suppress_bind_attrs = true,
	},
	.id_table	= wm831x_spi_ids,
	.probe		= wm831x_spi_probe,
};

static int __init wm831x_spi_init(void)
{
	int ret;

	ret = spi_register_driver(&wm831x_spi_driver);
	if (ret != 0)
		pr_err("Failed to register WM831x SPI driver: %d\n", ret);

	return 0;
}
subsys_initcall(wm831x_spi_init);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
2aa13b9e MB	2	/*
	3	* wm831x-spi.c -- SPI access for Wolfson WM831x PMICs
	4	*
	5	* Copyright 2009,2010 Wolfson Microelectronics PLC.
	6	*
	7	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
2aa13b9e MB	8	*/
	9
	10	#include <linux/kernel.h>
e85c5f0a	11	#include <linux/init.h>
f6dd8449	12	#include <linux/of.h>
87d1906d	13	#include <linux/pm.h>
2aa13b9e	14	#include <linux/spi/spi.h>
1df5981b MB	15	#include <linux/regmap.h>
1df5981b MB	16	#include <linux/err.h>
2aa13b9e MB	17
	18	#include <linux/mfd/wm831x/core.h>
	19
f791be49	20	static int wm831x_spi_probe(struct spi_device *spi)
2aa13b9e	21	{
f6dd8449	22	struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
2aa13b9e MB	23	struct wm831x *wm831x;
2aa13b9e MB	24	enum wm831x_parent type;
1df5981b	25	int ret;
2aa13b9e	26
15d71e67 RH	27	type = (uintptr_t)spi_get_device_match_data(spi);
	28	if (!type) {
	29	dev_err(&spi->dev, "Failed to match device\n");
	30	return -ENODEV;
f6dd8449	31	}
2aa13b9e	32
d48cbb74	33	wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);
2aa13b9e MB	34	if (wm831x == NULL)
	35	return -ENOMEM;
	36
2aa13b9e MB	37	spi->mode = SPI_MODE_0;
2aa13b9e MB	38
0c0d2ab0	39	spi_set_drvdata(spi, wm831x);
2aa13b9e	40	wm831x->dev = &spi->dev;
f6dd8449	41	wm831x->type = type;
1df5981b	42
130a7032	43	wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
1df5981b MB	44	if (IS_ERR(wm831x->regmap)) {
	45	ret = PTR_ERR(wm831x->regmap);
	46	dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
	47	ret);
1df5981b MB	48	return ret;
1df5981b MB	49	}
2aa13b9e	50
f6dd8449 CK	51	if (pdata)
	52	memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
	53
	54	return wm831x_device_init(wm831x, spi->irq);
2aa13b9e MB	55	}
2aa13b9e MB	56
87d1906d	57	static int wm831x_spi_suspend(struct device *dev)
2aa13b9e	58	{
87d1906d	59	struct wm831x *wm831x = dev_get_drvdata(dev);
2aa13b9e MB	60
	61	return wm831x_device_suspend(wm831x);
	62	}
	63
b9736a16	64	static int wm831x_spi_poweroff(struct device *dev)
523d9cfb	65	{
b9736a16	66	struct wm831x *wm831x = dev_get_drvdata(dev);
523d9cfb MB	67
523d9cfb MB	68	wm831x_device_shutdown(wm831x);
b9736a16 MB	69
b9736a16 MB	70	return 0;
523d9cfb MB	71	}
523d9cfb MB	72
87d1906d MB	73	static const struct dev_pm_ops wm831x_spi_pm = {
	74	.freeze = wm831x_spi_suspend,
	75	.suspend = wm831x_spi_suspend,
b9736a16	76	.poweroff = wm831x_spi_poweroff,
87d1906d MB	77	};
87d1906d MB	78
5570c2f7 MB	79	static const struct spi_device_id wm831x_spi_ids[] = {
	80	{ "wm8310", WM8310 },
	81	{ "wm8311", WM8311 },
	82	{ "wm8312", WM8312 },
	83	{ "wm8320", WM8320 },
	84	{ "wm8321", WM8321 },
	85	{ "wm8325", WM8325 },
	86	{ "wm8326", WM8326 },
	87	{ },
2aa13b9e MB	88	};
2aa13b9e MB	89
5570c2f7	90	static struct spi_driver wm831x_spi_driver = {
2aa13b9e	91	.driver = {
5570c2f7	92	.name = "wm831x",
87d1906d	93	.pm = &wm831x_spi_pm,
f6dd8449	94	.of_match_table = of_match_ptr(wm831x_of_match),
e85c5f0a	95	.suppress_bind_attrs = true,
412dc11d	96	},
5570c2f7	97	.id_table = wm831x_spi_ids,
412dc11d	98	.probe = wm831x_spi_probe,
412dc11d MB	99	};
412dc11d MB	100
2aa13b9e MB	101	static int __init wm831x_spi_init(void)
	102	{
	103	int ret;
	104
5570c2f7	105	ret = spi_register_driver(&wm831x_spi_driver);
412dc11d	106	if (ret != 0)
5570c2f7	107	pr_err("Failed to register WM831x SPI driver: %d\n", ret);
412dc11d	108
2aa13b9e MB	109	return 0;
	110	}
	111	subsys_initcall(wm831x_spi_init);